"generator:type"=>"solar_photovoltaic_panel","generator:method"=>"photovoltaic","generator:source"=>"solar","generator:output:electricity"=>"yes"
"generator:method"=>"photovoltaic","generator:output:electricity"=>"small_installation","generator:place"=>"roof","generator:source"=>"solar","location"=>"roof"
"generator:method"=>"photovoltaic","generator:output:electricity"=>"small_installation","generator:place"=>"roof","generator:source"=>"solar","location"=>"roof"
"generator:method"=>"photovoltaic","generator:output:electricity"=>"small_installation","generator:place"=>"roof","generator:source"=>"solar","location"=>"roof"
"generator:method"=>"photovoltaic","generator:output:electricity"=>"small_installation","generator:place"=>"roof","generator:source"=>"solar","location"=>"roof"